Eyeglass-mount.



W.-G. FAY. EYEGLASS MOUNT.

APPLICATION PILED r112. 10, 1909.

v Patented Dec. 29, 1908.

(S v sas.

MM- I metrical view of one of upon an enlarged scale UNITED STATESPATENT OFFICE.

WALDO G. FAY, OF PELHAM, NEW YORK.

EYEGLASS-MOUNT.

Speciflcation'oi Letters Patent.

Patented Dec. 29, 1908.

Application filed February 10, 1908. Serial No. 415,052.

To all whom it may concern:

Be it known that I, WALDO G. FAY, a citizen of the United States,residing in Pelham, Westchester county, and State of New York, haveinvented certain new and useful Impro'vements the following 13 aspecification.

My improvements relate to means for mounting, connecting and supportingeye-- the guard plate shanks and adjacent Fig. 3, a section taken- 3-3Fig. 2.; Fig. 4., a plane of line 44 parts; upon plane of line sectiontaken upon Fig. 3;,Fig. 5, is an Isothe lens hearings.

L, L, represent the'eye-glasses, and B the ordinary bow spring by whichhey are unite d through the medium of the posts or strd; P. The innerend-ofcach post or stud is formed with the usual parallel flanges 11,7), between which one end (1)) of the bow spring rests as well as theshank g, of the guard plate G, on that side of the mount. As heretoforeconstructed the end I), of the bow spring B and the shank g, of theguard plate G have been secured in position between the flanges 11, p,by a smgle central screw in line with the axis otthe post, and saidparallel flanges 1), have been relied u on to counteract al tendency tolateral p ay or movement ofthe spring end b, and shank 9, upon the screwas a pivot, but in practice, under the strain of actual and ontinuoususe, .these flanges p, p, soon yield more-or less under the strain towhich they are subjected by reason ofthe leverage exerted by the springand shank central screw as a fulcrum. As a result the joint between theparts soon becomes loose and wabbly greatly to the discomfort andinconvenience of the user and to the detriment of the mount as a whole.In some cases the screw even works out and is lost and in any case, eventhough the screw be reset or retightened frequ ntly the connectionbetween with the single Eyeglass-Mounts, of which of the end of one of,

. cured to the post by the parts is not as positive and rigid as is desirable in a mount of this character in. which considerable transversestrain is exert-ed upon the flanges p, p, of the post P the ordinaryadjustment and manipulation of theeye-glasses. I obviate thisriiiiiculty by the use of two relatively small screws a. a, passingthrough the shank g, of the guard plate and the end 6, of the bowspring, and engaging with female screw threads 1n the post plate onoppqgiitesides of the axial line thereoi: as will understood byreferenceto Figs. 2 and. 3,the headsof the screws 0,

a, being countersunk within the shank 'g,

of the guard plate so as to be flush. with the face of said shank orsubstantially so. I preferably make these screws with conical heads andform conical recesses in the- -shank g, for their reception, so that theact of tightening the screws in position will tend to alineand wedge thepartsv in proper relation to each other. The countersmking of the screwheads afiords a flush smooth surface for possible contact with the noseof the wearer, and avoids the accumulation of dirt around the heath ofthe screws! It will thus be seen that the two screws a, a, air-tin inconjunction, counteract all tendency to ateral play orvibration,relieving the flanges 1), p, of undue strain and wear, andv preservingthe integrity and rigidity of the joint as a whole, a result of greatpracticalimportance, since heretofore th'e loose .of the joint betweenspring, shank and postv as been one main source of trouble in eyeglassesof this class, and one frequently calling for re-- pair or reproductionof parts.

Thebase or inner portion of each post P is.

formed with the usual strap 1), for bearing against the rim of the lensLand with the side bearings 12, p,

overlapping the sidesthereof. Heretofore the lens L has been sea screwpassing through a hole in one side bearing 12?, and through aperforation-in the lens L, and engaging a female screw thread in theother side beari of the post. This affords a rigid integra connectionwhich, while most desirable at the inner end of. the post as related tothe spring bow and guard, is most objectionable at-the outer end of thepost when the brittleness of the lens. is taken into account. In thefirst place the holes for the screw bolt must be formed with exceptionalaccuracy as related to-each other and to the strap p, otherthere resulteither a looseness and play of the lens which has heretofore beentakenup by bending thestraps forward, or. a tightness of contact between thestrap and the edge of the lens which will be disastrous to the latter inthe case of contraction by de-. crease of temperature. The bending ofthe ends of-the strap toward the edge of the lens,

which is usually done to afford a spacebetweenthe central portion of thestrap and the opposed edge of the lensto allow for contraction of themetal at low temperature otherwise the rigid-unyielding pressure exertedby the 0 posed surfaces in contact will.

obviously ten to crack the lens. I'obviate:

thesediniculties by connecting the lens'toi :the postby means of aresilient clutch ,con-.

- sisting referably ofa truncated conical wedge s eeve s, movablelongitudinally upon the screw bolt 8, and held in engagement '.'with thesides of. the perforation l,-in the lens L by means of'a. spring sinterposed between the wedge sleeve 8, and the end'of a' cap nut s*,with which the threaded end of the screw'bolt s, engages,-'-the outeredge of said cap nut 8 resting against. the side b'earing-p, of the postP 'upon that side of the lens,as will be seen by reference to Fig. 4.

, It is evident that the wedge sleeve '8, may

' prefer that shape for 'sirnplicit and because be other'than conical inexternal form, but I it calls only for a lain-conica bore-Z, in the lensL. It will e noted that the wedgesleeve 8, does not enter entirelywithin the perforation in the lens, thus insuring a close] contact ofopposed conical surfaces.

The pressure of the spring .9 against the wedge sleeve 8, on the screwbolt 8, insures an intimate engagement and interlocking of the partssufficient to sustain the. lens firmly in position-under ordinaryconditions of use,

while at the same time the resilience of the spring affords a degree ofelasticity and flexibility sufficient to allow the parts to adaptthemselves within prescribed limits to u'ndue strain. The spring alsoallows and compensates for expansion and contraction of the parts undervariations in temperature, and maintains a practically uniform pressureand contact thereof under all circumstances. Hence the glass is keptfrom working loose,

being held in position and centralized by the wedge sleeve which in turnis supported and centralized by the screw bolt s. The wedge also keepsthe lens tight against the strap for its entire length, and as the strapis formed to fit the edge of the lens it'cannot bend back and becomeloose.

What]: claim as my invention and'desire to secure by Letters l'atent is,

1. In an eye-glass mount of the character designated, the combinationwith each lens post and perforated lens, of a screw bolt passing-througha side bearing of the post and through the perforation in the lens, awedge sleeve on said bolt projecting into the perforation in the lens, acap nut on the end 'of the screw bolt, and a spring ifiterposed betweensaid cap nut and said edge sleeve, for the purpose'described. T I

2. In an eye-glass mount of the character designated, the combinationwith each lens post and perforated lens, of a screw bolt passing throughthe side bearings of the post and the perforation in the lens, a wedgesleeve on said bolt projecting into the perforation in the lens, a capnut on-theend of the screw bolt,.and,a spring interposed between saidcap nut and said wedge'sleeve, forthe purpose described. p

3. In-an eye-glass mount of the character designated, the combinationwith each lens post of 'a lens formed with a conical perforation, ascrew bolt passing through the side bearings of the post and the conicalperforation in the lens, a' truncated conical wedge sleeveon said boltprojecting into the conical perforation in the lens, a cap nut on theend of the screw bolt, and a spring interposed between said cap nut andsaid truncated conical wedge sleeve, for the purpose described. I

WALDO G. FAY.

Witnesses: D. W. GARDNER, GEO. WM. Mmrr.

